Conveying and flattening device for small bags filled with tea or the like



A. RAMBOLD Oct. 9, 1934.

CONVEYING AND FLATTENING DEVICE FOR SMALL BAGS FILLED WITH TEA OR THE LIKE Filed May 1, 1951 3 Sheets-Sheet l Jnventor.

Oct. 9, 1934. RAMBOLD 1,976,691 I CONVEYING AND FLATTENING DEVICE FOR SMALL BAGS'FILLED WITH TEA OR THE LIKE Filed May 1, 1931 5 Sheets-Sheet 2 Oct. 9, 1934.

CONVEYING AND FLATTENING DEVICE FOR SMALL BAGS FILLED WITH TEA OR THE LIKE A. RAMBOLD 7 Filed May 1, 1931 3 Sheets-Sheet 3 Jnvent or. x-W

Patented Oct. 9, 1934 UNITED STATES PATENT OFFICE Adolf Rambold, Dresden, Germany Application May 1, 1931, Serial No. 534,424 In Germany October 18, 193

REISSUED 6 Claims. (Cl. 93-2)- element 4 the folding of the paper is continued This invention relates to a device for conveying and pressing flat small bags containing tea or the like on machines for shaping, filling and closing little bags.

The bag made on the machine must be removed from the conveyor band and fed to a device for flattening the same. The invention consists in that the finished bag is brought from the travelling conveyor band of the finishing machine by means of a controlled yoke between two oscillatable cheeks actuated by levers and adapted to open; a shaping element arranged vertically shiftable above these cheeks pushes the bag through the pressing cheeks.

A further feature of the invention is the provision of means for turning the bag around its own axis so that the label is kept away from it.

Another feature of the invention is the provision of a thread guide which keeps the thread end with the label away from the bag.

An embodiment of the invention is illustrated by way of example in the accompanying drawings in which:-

Fig. 1 shows the device in side elevation.

Fig. 2 shows in front elevation the clamping frame with its oscillatable arm.

Fig. 3 is a top plan view of part of Fig. 1.

Fig. is a top plan View of the conveyor yoke.

Fig. 5 shows the turning of the bag during the movement from the conveyor band to the pressing cheeks.

Fig. 6 shows the spreader in top plan view.

A hollow shaft a journaled in the machine frame and driven by spur wheels 1' and the like, carries a fixed yoke formed by two arms 1, Z. The shaft 11. is supported by bearings s and t. Sleeve-shaped bearings c in which grippers d are loosely mounted are provided in the two arms 2, l The grippers d have tines h for preliminarily folding a paper sheet in which the bag is wrapped. As soon as the grippers come into the same plane as the bag, they close. The bag thus gripped is moved along the arc of a circle, being thereby turned and brought on the wrapping sheet. The paper sheet for wrapping the bag is taken from a pile below the cylinder segment 23 between the cylinders 21,- 22 and conveyed by these cylinders to the machine table 8. The folding is effected by the approachment of the cheeks, the slightly rounded ribs on the lower end project into the table (Fig. 1) and the inclined surface is situated at a distance of /2 mm parallel to the inclined surface of the table so that the paper can be inserted therebetween.

By the downward movement of the shaping and the bag at the same time brought into the wrapping. The pile. of paper sheets is raised by the cam 'disc 31 keyed, on the shaft 32 through the intermediary of the two-armed lever 33 as soon as the cylinder segment is above the pile of sheets. The sheet adhering to the cylinder segment 23 and which is brought between the cylinders 21, 22 is stripped off the cylinder segment 23 by a stripper 35 provided. on the machine frame. The cylinders are driven by the toothed wheel 36 through the intermediary of the toothed wheels 37, 38, 39 and 40. The grippers d are controlled by the stationary cam roller 9' through the intermediary of a lever e, the grippers being normally held closed by the spring 0: in such a manner that the ends of the grippers d approach for gripping the bag and open wide after delivering the bag to the pressing cheeks 3, 3'. The plate 3 is slotted as shown in Fig. 3 to accommodate the string of the label. The thread and the label are brought into the proper position by the spreader 60. These two pressing cheeks 3, 3' are arranged above the machine table 8 and rigidly connected to arms 5, 5' extending through apertures in the table 8 and are oscillatable around pivot pins 6, 6'.

The bag held by the grippers cl would however, in being oscillated from the conveyor band arrive betwecn the cheeks 3, 3'v upside down that is with its neck downwards, consequently the bag must not only be oscillated by the yoke when being moved from the conveyor band but must also be turned around its own axis in order to hold the thread with the label away from the bag and to bring the same into the position shown in Fig. 3-by means of the spreader 60. For this piupose the grippers d are loosely mounted in their sleeves. The discs mounted on the grippers d bear-against the levers e so that the grippers can be operated and closed, have teeth on their circumference which mesh with a curved rack mounted on the machine frame. The bag is thus turned by these means around its own axis during its transport from the conveyor band besides being oscillated. The pressing cheeks 3, 3' are swung out and driven apart by means of the levers 7, 7' acting upon the arms and controlled of the bags so that during the flattening of the bag by means of the cheeks-3, 3' the bag can not be pressed apart in upward direction, thatis towards the element 4. The pressing cheeks 3, 3 are provided with ribs 20 which preliminarily fold the wrapping sheet delivered by the pressure cylinders 21, 22 and in the mean time brought on to the table 8. The table 8 is provided with an aperture 30 through which the label drops which is suspended on a thread on the bag.

A toothed wheel 36 is rotated by the main drive. All the parts of the machine receive their motionfrom this toothed wheel 36. It meshes with a toothed wheel 16 mounted on a short shaft 13, which in turn meshes with a toothed wheel 15, keyed on one end of a shaft 10, carrying at its other end a. toothed wheel 17 meshing with a toothed wheel 18 keyed on a second short shaft 14 coaxial to the shaft. 13. Thus the toothed wheel 36 drives the toothed wheel 16 which rotates the toothed wheel 15 together with its shaft 10 and toothed wheel '17 which drives the toothed wheel 18. The shaftslO, 13 and 14 carry conveyor rollers 9 which grip the edges of the paper containing the bag and feed it to the drum 24. The rollers are driven from the shafts 10, 13 and 14 through the intermediary of belts 12 and 12'. Below the shafts 10, 13 and 14. a drum 24 is arranged which carries on its circumference pressing plates 25 and 26, between which the bag wrapped in paper arrives for conveyance.

The device operates in the following manner.

The shaft a rotating in clockwise direction brings the grippers :1 near the bag. Below the conveyor band, on which the bag made on the producing machine is arranged, the grippers (1 open, owing to the pushing forward of the cam f by means of the cam roller g. The ends of the levers e press against the gripper plates 1 so that the grippers move apart in'the sleeves c. As soon as the grippers are in the same plane as the bag, thus slightly inclined to the horizontal plane, they again close, so that the bag is clamped and held tightly between the ends of "the grippers. The bag thus gripped is carried by the yoke along through an arc of a circle, and during such arcuate travel, there is a swinging movement imparted to the bag occasioned by the rotation of the grippers on their own axes, and brought between the cheeks 3, 3' folded apart. The label attached to, the bag by means of a. thread drops during this movement and is held away from the bag by a spreader 60 or rod lying horizontally in front of the cheeks or by the cheek 3 itself in such a manner that the label cannot come between the cheeks and be packed in the paper sheet wrapping. The unfolded cheeks are then folded together through the intermediary of the levers 5, 5 and 7, 7, so that the bag is compressed between. the

cheeks which now stand parallel. At the same time the ribs 20 provided on thecheeks fold the paper sheet lying on the machine table 8'.

' yoke, a. cam roller adapted to control said gripshaping element 4 then descends and presses the bag between the cheeks at the same time further shaping same. The paper sheet is during the operation pushed through the aperture in the machine table, so that the side edges of the paper sheet are gripped by the conveyor rollers 9. The conveyor rollers deliver the bag wrapped in paper between the plates 25, 26 of the drum 24.

The wrapped bag is held between the clamping plates 25 and 26 which are normally held to- -gether by a spring 59. It is necessary for the cheeks to be opened below the depositing point of the bag by theoperating and wrapping de=-. vice but to close during the further rotation of the drum 24.

For this reason the plates 26 are loosely journaled on the drum 24 as illustrated. A pivot arm 56 is connected with the plate 26 and carries a roller 57 which runs on a cam 58, so that in cooperation with the spring 59 the oscillating movements of the plane are effected.

l. A conveying and flattening device for small bags filled with tea and the like, for the conveying and pressing flat of the bags, compris- 1 ing in combination a conveyor band, two press- 00 ing cheeks, levers adapted to swing upwards said cheeks, a yoke adapted to bring the filled and closed bags from said conveyor hand between said cheeks, and a descending shaping element above said cheeks adapted to shape the upper portion of the bag. I

2. A device as specified in claim 1, comprising in combination with the rotary yoke mounted on the machine frame, grippers mounted in said pers, and a lever system adapted to transmit the movement from said cam roller to said. grippers.

3. A device as specified in claim 1, comprising in combination with the pressure cheeks, a rib on the lower end of each of said cheeks adapted to effect the preliminary folding of the wrapping sheet.

4. A device as specified in claim 1, comprising in combination with a machine table and the pressure cheeks, conveyor rollers arranged under said machine table adapted to convey the Awrapped bag from said cheeks.

5. A device as specified in' claim 1, in which the machine table has a recess for accommodating the label attached to the bag by means of a thread during the wrapping of the bag between the pressure cheeks.

6. A device as specified in claim 1, comprising in combination withthe machine frame, and the 1 yoke rotatably mounted in. the machine frame, sleeves mounted in said yokes, grippers loosely mounted in said sleeves, and adapted to rotate around their own axes whereby a bag may be swung during movement of the yoke from said conveyor to a point between said cheeks, and a thread guide adapted to guide the thread of the label during movement of the bags. 

